Weighing scale



:Oct. 2,1928.

H. o. HEM

WEIGHI'NG SCALE Filed March l l, 1925 flan 0r a Hem tion view, ofa portion of the scale taken s'ub-,

Figure Patented Oct. 2, 1928 5 I mvon 0. Hart, or'ronnno, orrro, assionoa T 'ronano scar.

' 01110, A oomonarron or NEW .rnasn wnrenm n comramr, on'romno, Y.

a scam.

Application filed use. 1'1, 1925. Serial m 14,171.

This invention relat esto weighing scales, and more particularly to devicesfor preventing derangement ofthe knife edge pivots in their bearings. v v

It is. one of the principal objects of this invention to provide 'asimple and effective means for preventing -derangement of the pivots and bear-in s inf-weighing scales. Anotherfobjec t isthe provision of means for preventing the derangement of the pivotsand bearings, Which means may be adjusted to compensate'for any inaccuracies in the manufacture of the scale parts.

Still another object is the provision of a device for'preveiiting derangement of cer-,

tain elements of "a weighing scalewhich is simple and inexpensive tomanufacture and which may be incorporated inscales of known types without effecting changes in the design thereof." 4

Other objects land advanta es will beapparent from the followin ?lescription, in which reference ishadto t e accompanying drawings illustrating fa. preferred embodu a5 ment of my invention and wherein similar reference numerals designate similar partsthroughout-the several views. 2

- Inthe drawings Fi ure I is a side elevational view ofa known type embodyweig 'ng scale of a well in my invention; igure' II is'a vertical transverse sectional viewv through a ortion of the scale taken substantiall on t e line II--II of Flgure I;

Fi re is an enlarged fragmentary sec- Y stantially on the line HI -1110f Figure I,

showing the platform retamlng means of my lan view, partly in secinvention-and.

lV is atop p tion, of a portion 0 .the scale ShOWlIlg the platform retaining means. J

5 Referring to thedraw-ings in detail, I have illustrated the device of my invention as inoorporated in a scale of the counter type, but it is to be understood that it may be employed wherever its usema befound desirable. The scale comprises su stantially abase l supportin at oneend thereof a fulcrumstand 2 whic supports the main lever 3, the lever being provided with lever pivots tadapted to support a spider 5 upon wh ch issuperimposed; a commodity receiving p1atform6..

s5 housing7 erected upon the base 1, and is suit- The apices of the V normally engage the-knife edges of The nose end of the lever pro ectsinto ,a H

ably connected to a pendulum load-counter balancing and indicating mechanism. The platform is prevented from tippin when a load is placed on the edge thereof y means of a link 8 pivotally secured at points 9 and 10 to a spider stem 11 and a post 12 fixed to the base. Y

' In the operation of the scale a load to be wei hed may be placed upon the platform 6, causing the ever 3 to be moved downwardly and move the pendulum mechanism (not shown) to a position to counterbalance the load. It g'vill be apparent that if the load be placed upon the platform in the position indicated atA it will be directly over the pivots 4, and ifthe other moving parts are correctly adjusted the indication of the load will be accurate. If, however, the load-i. e., a comparatively heavy \load substantially e uivalent tov the capacity of the scalebe p aced inthe position indicated at B, ,the tendency of the platform structure is to shift its position in a clockwise direction about the pintle 9, the latter acting as a-fulcrum'. The platform supporting spider is provided with V-shaped bearings 12, preferabl of agate. grooves of t e bearings the pivots 4, butwiththeload in position B the platform and bearings 12 are shifted from their normal positions relative to the ivots 4, thus bringing the rounded sides of t e pivots 4 into engagement with'the thrust lates l3 and virtually changing the point 0 engagement of the load with the lever, which condition would cause an inaccurate indication of the weight, and in addition a. certain amount of friction would be set up which wouldalso vitally affect the accuracy of the scale. I have rovided simple and efiective 95 means for obviating these difliculties, which means will now be described. 1 The laterally extending arms of the spider 5 are provided with threaded studs 15 fixedl' retained in the arms by means of lock nuts'l the depending portions of said studs adapted to receive the plates '17 retained in place by means of nuts 18. The levep 3 is provided with integral Linwardlyprojecting bosses 20 having threaded aperturestherein adapted to receive cone pointed screws 21.

The studs15 are soadjusted that the upper surfaces of the plates17 are coincident with a substantially horizontal lane through the apioes or edges of pivotaan 11c the screws 21 are adjusted cone points th the upper surfaces of ticularly illustrated points of the screws with the edges of the piv free to move in t ings "ret from abnormal dis no matter in e placed upon the plat e embodiment of my shownand descri lustrative only, an the invention is susceptible to fication and change within scope of the sub Having descri 1. In a device combination, a mem pivot, a member l said pivot, and mea ment of said pivot eluding a cone piv having said knife e sting said cone pivo pivots may adju into alignment with the apex o edge pivot.

2. In a Weighing lever having pivots, ported on said pivo bearing late carrie ture, in sai ereof intos the plates 17 as an a cone pivo d boss and adapted to b so as to bring the engagement with said bearing plate to prelight contact with vent displacement of said plat parpivots.

As the p 3. In a weighing scale, in combination, a 21 lie in a line coincident lever having pivots, a platform supported on ots 4 the parts are said pivots, an auxiliary bearing plate adheir normal loci but the bearjustably carried by said platform, and a cone orm on said he spider 5 are prevented p vot adjustably supported in said lever and acement relative to said adapted to normal what position the load bearing plate to prevent abnormal displaceen a e said auxilia ment of said platform.

invention herein 4. In a device of the class described, in be regarded as ilcombination, a member having a knife edge d it is to be understood that pivot, a member having a bearing engaging variation, modisaid pivot, and means for preventing derangethe spirit and ment of said pivot and bearing, said means 1noincd claims.

ed my invention, I claim: oppositely to the apex of said knife edge pivf the class described, in 0t, and means for adjusting said cone pivot eluding a cone pivot having its apex directed her having a knife edge to bring its apex into alignment with the apex 'ng a bearing engaging of said knife edge pivot.

ns for preventing derange- 5. In a weighing scale, in combination, a ng, said meansinlever having knife edge load pivots, a platot carried by the member form structure having bearings engaging dge pivot, and means for said load pivots, a cone pivot carried by sai t to bring its apex lover, a bearing plate carried by said platf said knife form structure, and means for adjusting sai cone pivot and bearing plate to bring the scale, in combination, a apex of said cone pivot into engagement with a platform structure supsaid-bearing plate with the point of engagets, a boss on said lever, 21 ment substantially in line with the apices o d by said platform strucsaid knife edge pivots.

t adjustably supported e brought into HALVOR O. HEM.

f as 

